Dock Sides 86911 Silver Stand Mounting Base The GalvX Dual Coat provides an epoxy coat base layer for corrosion resistance and a powder coat outer layer providing an attractive and durable finish; The GalvX coating is required for use with aluminum docks Quick and easy installation and removal with Dock Sides Receiver Requires one receiver (Sold Separately, please see Dock Sides part numbers 86900, 86901 or 86902) Universal mounting for most manufacturers' offset (side post) umbrellas Also provides mounting for light poles and showers